wiki:WRF4GTutorial

Version 19 (modified by carlos, 10 years ago) (diff)

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Run a simple experiment on the machine where WRF4G is installed

Before starting this tutorial make sure you have correctly installed WRF4G on your machine following the Installation instructions

Start wrf4g_framework and list computing resources

Simply start the WRF4G Framework:

[user@mycomputer~]$ wrf4g_framework start

Doing this, we will start the services that manage the computing resources and keep track of the experiments.

Note that if you do not start wrf4g_framework you won't be able to work with WRF4G.

WRF4G framework is configured by default to use a single computing resource (the computer where WRF4G has been installed). To list the computing resources where you can submit experiment (in this case only localhost) run the following:

[user@mycomputer~]$ wrf4g_resources 
HID PRIO OS              ARCH   MHZ  %CPU    MEM(F/T)     DISK(F/T)      N(U/F/T) LRMS               HOSTNAME                      
0   1    GNU/Linux2.6.32 x86_64 2000    0    439/3270     1143/8662         0/1/1 FORK               mycomputer   

Prepare and submit the test experiment

Go to the directory where the experiment configuration files are located:

[user@mycomputer~]$ cd $WRF4G_LOCATION/experiments/single_test

Edit experiment.wrf4g and check its configuration.

Run wrf4g_prepare to prepare the experiment:

[user@mycomputer~]$ wrf4g_prepare
Preparing namelist...
WRFV3/run/namelist.input
WRF Check Warning: CAM radiation selected but paerlev/levsiz/cam_abs_dim1/cam_abs_dim2 was not set. Fixing...
WRF Check Warning: radt is shorter than dx (0.500000)

---> Single params run
---> Continuous run
        ---> cycle_chunks: test 2011-08-28_12:00:00 2011-08-30_00:00:00
                ---> chunks 1: test 2011-08-28_12:00:00 2011-08-29_00:00:00
                ---> chunks 2: test 2011-08-29_00:00:00 2011-08-29_12:00:00
                ---> chunks 3: test 2011-08-29_12:00:00 2011-08-30_00:00:00

Check the experiment status with wrf4g_status. You will see the experiment is in P (Prepared status).

[user@mycomputer~]$ wrf4g_status 
Experiment P   W   R   D   F  
test       1   0   0   0   0 

[user@mycomputer~]$ wrf4g_status --long
Realization        GW  Stat Chunks Comp.Res   WN         Run.Sta       ext   %
test               -     P     0/3        -    -        Prepared       -  0.00

Submit the experiment with wrf4g_submit and check the status during one minute. You will see the status of the experiment: submitted, downloading input data, ungrib, metgrid, real and wrf.

[user@mycomputer~]$ wrf4g_submit 
Submitting realization: "test"
        Submitting Chunk 1:     2011-08-28_12:00:00     2011-08-29_00:00:00
        Submitting Chunk 2:     2011-08-29_00:00:00     2011-08-29_12:00:00
        Submitting Chunk 3:     2011-08-29_12:00:00     2011-08-30_00:00:00

[user@mycomputer~]$ wrf4g_status 
Experiment P   W   R   D   F  
test       0   1   0   0   0 

[user@mycomputer~]$ wrf4g_status --long 
Realization        GW  Stat Chunks Comp.Res   WN         Run.Sta       ext   %
test               0     W  1/3    -          -          Submitted       - 0.00

[user@mycomputer~]$ wrf4g_status --long
Realization        GW  Stat Chunks Comp.Res   WN         Run.Sta       ext   %
test               0     R  1/3    mycomputer sipc18     real            - 0.00

[user@mycomputer~]$ wrf4g_status --long
Realization        GW  Stat Chunks Comp.Res   WN         Run.Sta       ext   %
test               0     R  1/3    mycomputer sipc18     WRF             - 0.00

Check the experiment output and log

The location where output and log files are stored is defined with the WRF4G_BASEPATH variable in resources.wrf4g. Check WRF4G_LOCATION/etc/resources.wrf4g to discover where WRF4G_BASEPATH is pointing. You will see that it is pointing to WRF4G_LOCATION/repository/output. Go to WRF4G_LOCATION/repository/output/test/test and see the folders structure and the output files.

[user@mycomputer~]$ ls -lh /tmp/WRF4G/repository/output/test/test/output
total 420K
-rw-rw-r-- 1 user user 6.2K 2011-10-28 12:40 wrf24hc_d01_20110828T120000Z_20110828T120000Z.nc
-rw-rw-r-- 1 user user 6.2K 2011-10-28 12:41 wrf24hc_d01_20110829T000000Z_20110829T000000Z.nc
-rw-rw-r-- 1 user user 6.2K 2011-10-28 12:43 wrf24hc_d01_20110829T120000Z_20110829T120000Z.nc
-rw-rw-r-- 1 user user 14K 2011-10-28 12:40 wrfout_d01_20110828T120000Z_20110828T180000Z.nc
-rw-rw-r-- 1 user user 11K 2011-10-28 12:40 wrfout_d01_20110828T210000Z_20110829T000000Z.nc
-rw-rw-r-- 1 user user 14K 2011-10-28 12:41 wrfout_d01_20110829T000000Z_20110829T060000Z.nc
-rw-rw-r-- 1 user user 11K 2011-10-28 12:41 wrfout_d01_20110829T090000Z_20110829T120000Z.nc
-rw-rw-r-- 1 user user 14K 2011-10-28 12:43 wrfout_d01_20110829T120000Z_20110829T180000Z.nc
-rw-rw-r-- 1 user user 11K 2011-10-28 12:43 wrfout_d01_20110829T210000Z_20110830T000000Z.nc
-rw-rw-r-- 1 user user 3.4K 2011-10-28 12:40 wrfrain_d01_20110828T190000Z_20110828T190000Z.nc
-rw-rw-r-- 1 user user 3.4K 2011-10-28 12:41 wrfrain_d01_20110829T070000Z_20110829T070000Z.nc
-rw-rw-r-- 1 user user 3.4K 2011-10-28 12:43 wrfrain_d01_20110829T190000Z_20110829T190000Z.nc
-rw-rw-r-- 1 user user 99K 2011-10-28 12:40 wrfxtrm_d01_20110828T120000Z_20110829T000000Z.nc
-rw-rw-r-- 1 user user 99K 2011-10-28 12:41 wrfxtrm_d01_20110829T000000Z_20110829T120000Z.nc
-rw-rw-r-- 1 user user 99K 2011-10-28 12:43 wrfxtrm_d01_20110829T120000Z_20110830T000000Z.nc


[user@mycomputer~]$ tree /tmp/WRF4G/repository/output/test/test
.
├── log
│   ├── log_1_1.tar.gz
│   ├── log_2_2.tar.gz
│   └── log_3_3.tar.gz
├── namelist.input
├── output
│   ├── wrfout_d01_19830825T120000Z_19830825T233000Z.nc
│   ├── wrfout_d01_19830826T000000Z_19830826T000000Z.nc
│   ├── wrfout_d01_19830826T000000Z_19830826T113000Z.nc
│   ├── wrfout_d01_19830826T120000Z_19830826T120000Z.nc
│   ├── wrfout_d01_19830826T120000Z_19830826T233000Z.nc
│   ├── wrfout_d01_19830827T000000Z_19830827T000000Z.nc
│   ├── wrfrain_d01_19830826T000000Z_19830826T000000Z.nc
│   ├── wrfrain_d01_19830826T120000Z_19830826T120000Z.nc
│   ├── wrfrain_d01_19830827T000000Z_19830827T000000Z.nc
│   ├── wrfxtrm_d01_19830825T120000Z_19830825T233000Z.nc
│   ├── wrfxtrm_d01_19830826T000000Z_19830826T000000Z.nc
│   ├── wrfxtrm_d01_19830826T000000Z_19830826T113000Z.nc
│   ├── wrfxtrm_d01_19830826T120000Z_19830826T120000Z.nc
│   ├── wrfxtrm_d01_19830826T120000Z_19830826T233000Z.nc
│   └── wrfxtrm_d01_19830827T000000Z_19830827T000000Z.nc
├── realout
└── restart
    ├── wrfrst_d01_19830826T000000Z.nc
    ├── wrfrst_d01_19830826T120000Z.nc
    └── wrfrst_d01_19830827T000000Z.nc